Stands for Rust Belt Mother Fucker. A phrase used when talking about people from Ohio, most notably students from The Ohio State University. These slapdicks refuse to recognize the inferiority of the Big Ten (wait I count 11?), and act surprised when teams from the south make their Buckeyes look mediocre and slow. RBMF’s fail to comprehend how defensive linemen in the SEC are faster then everyone on their team. RBMF's are scared to death of having a conference championship game.

Sociologically, RBMF's are bitter that their moms lost their jobs when the factories shut down, that their dads' farms were foreclosed and repossessed, and that all that remains of their childhood is a rusted tractor body (the wheels were burned to provide heat during harsh winter).